1

Migraine vs Vertigo:
If the spells are true vertigo (a spinning sensation, not just "floating") that lasts about a minute associated with nausea and triggered by head movement, you may have a condition called bppv. This can be treated with physical therapy. Another possibility, especially given the fatigue, is a vestibular migraine. A neurologist would be able to investigate and guide treatment.
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4

Possible:
If it's too early for PMS, it's clearly too early for a test. Your ovulation seems to have been longer ago than I'd have thought by a bit - But if you had unprotected sex near that event it certainly is possible. If you want this - good. If not, ALWAYS use protection. Also, think about STDs and condom protection. Take care - best!
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Many causes:
You have significant symptoms for long. these can be due to hormonal imbalance, vitamin deficiencies, heart, liver or kidney problems amongst other reasons. I urge you to see your family doctor as soon as possible. best wishes
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6

Pregnancy symptoms:
Are you pregnant? I can't tell from your question. Are you being treated for PCOS? You need to be seen by a doctor and hopefully you will provide the doctor with more medical history. The symptoms you describe are suggestive of pregnancy, which can be very difficult with PCOS, and hormonal surge w/ PCOS may produce some of these symptoms, which will improve with proper treatment.
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8

Positional vertigo:
When dizzy spells occur that give the sense of swaying or motion, and when they are worse with moving, this is usually a sign of benign paroxysmal positional vertigo. This is not caused by lack of sleep or fatigue but rather by changes within the inner ear.
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9

Don't worry, be seen:
It sounds as if you're having a changing pattern of headaches. This can happen with various types of headache, but if you're feeling dizzy and shaky, as well as fatigue, you should see your doctor for evaluation of other causes of your symptoms, including exploration of why your headaches are escalating and how best to treat them. Don't worry, but don't put off seeing your doctor.
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10

See below:
Your numerous symptoms could be attributed to a myriad of conditions. Without a comprehensive history and physical exam it would be difficult to offer you a diagnosis. The reassuring thing is that your condition is likely not a fatal condition since it has been present since age 3. A dysautonomia is most likely. Tilt table testing can help make diagnosis.
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